测试数据生成

[
  {
    "id": 1,
    "name": "Bob",
    "age": 40,
    "city": "Hangzhou"
  },
  {
    "id": 2,
    "name": "Alice",
    "age": 47,
    "city": "Shanghai"
  },
  {
    "id": 3,
    "name": "Ethan",
    "age": 34,
    "city": "Chengdu"
  },
  {
    "id": 4,
    "name": "Fiona",
    "age": 24,
    "city": "Beijing"
  },
  {
    "id": 5,
    "name": "Bob",
    "age": 25,
    "city": "Shenzhen"
  },
  {
    "id": 6,
    "name": "Fiona",
    "age": 46,
    "city": "Hangzhou"
  },
  {
    "id": 7,
    "name": "Fiona",
    "age": 27,
    "city": "Hangzhou"
  },
  {
    "id": 8,
    "name": "Hana",
    "age": 36,
    "city": "Hangzhou"
  },
  {
    "id": 9,
    "name": "Charlie",
    "age": 40,
    "city": "Hangzhou"
  },
  {
    "id": 10,
    "name": "Daisy",
    "age": 35,
    "city": "Nanjing"
  }
]